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  7. 07CSS Disabled Button State (Full State Reference)
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  9. 09CSS Add to Cart Button
  10. 10CSS Download Progress Button
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  12. 12CSS Confirm Delete Button
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  23. 23CSS Frosted Ice Cube Button
  24. 24CSS Vintage Typewriter Key Button
  25. 25CSS Lacquered Walnut Wood Button
  26. 26CSS Pharma Gel Capsule Button
  27. 27CSS Aged Copper Coin Button
  28. 28CSS Origami Fortune Cookie Button
  29. 29CSS Holographic Foil Sticker Button
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  42. 42CSS Aged Brass Subway Token Button
  43. 43CSS Vintage Rx Pharmacy Label Button
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  45. 45CSS Regal Postage Stamp Button
  46. 46CSS Victorian Cigar Band Foil Button
  47. 47CSS Vintage Calculator Key Button
  48. 48CSS Toolbox Latch Spotlight Button
  49. 49CSS Receipt Paper Total Count-Up Button
  50. 50CSS IBM Punch Card Magnetic Follow Button
  51. 51CSS Brass Periscope Lens Button
Pure CSSMIT licensed

CSS Pharma Gel Capsule Button

A two-tone gelatin capsule with a wet specular streak, a visible seam where the halves overlap, and a dose of liquid that rises through the shell on hover. Press it and the capsule compresses along its long axis like soft gelatin.

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The code

<div class="cb-26">
  <div class="cb-26__stage">
    <button class="cb-26__btn" type="button">
      <span class="cb-26__dose" aria-hidden="true"></span>
      <span class="cb-26__shine" aria-hidden="true"></span>
      <span class="cb-26__label">Take one daily</span>
    </button>
  </div>
</div>
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@500;600;700&display=swap');

.cb-26 {
  --bg: #eef2f4;
  --cap: #f6f8fa;
  --body: #e0483c;
  --liquid: #ffb347;
  --ink: #ffffff;
  --ink-alt: #3a2d2b;
  --cap-w: 5.5rem;
  --sans: "DM Sans",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  width: 100%;
  min-height: 100vh;
  min-height: 100svh;
  display: block;
  background: radial-gradient(34rem 20rem at 50% 40%, #ffffff, transparent 70%), var(--bg);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

@supports (color: oklch(50% 0 0)) {
  .cb-26 {
    --bg: oklch(95.5% .006 220);
    --body: oklch(58% .19 28);
    --liquid: oklch(82% .14 72);
  }
}

@media (prefers-color-scheme: dark) {
  .cb-26:not([data-theme="light"]) {
    --bg: #141819;
    --cap: #dfe6ea;
    --body: #c4372c;
  }
}

.cb-26[data-theme="dark"] {
  --bg: #141819;
  --cap: #dfe6ea;
  --body: #c4372c;
}

.cb-26,
.cb-26 *,
.cb-26 *::before,
.cb-26 *::after {
  box-sizing: border-box;
}

.cb-26__stage {
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: clamp(1.5rem,6vw,4rem);
}

.cb-26__btn {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  cursor: pointer;
  min-height: 3.5rem;
  padding: 0 2.2rem 0 calc(var(--cap-w) + 1rem);
  border: 0;
  border-radius: 999px;
  font: inherit;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -.005em;
  color: var(--ink);
  background-image: linear-gradient(90deg, var(--cap) 0 var(--cap-w), var(--body) var(--cap-w) 100%), linear-gradient(90deg, transparent calc(var(--cap-w) - .5rem), rgba(0,0,0,.14) calc(var(--cap-w) - .1rem), rgba(255,255,255,.32) calc(var(--cap-w) + .2rem), transparent calc(var(--cap-w) + .7rem));
  box-shadow: inset 0 -.35rem .7rem rgba(0,0,0,.18), inset 0 .3rem .5rem rgba(255,255,255,.5), 0 14px 26px -14px rgba(30,20,18,.55);
  transition: scale .3s cubic-bezier(.16,1,.3,1), translate .3s cubic-bezier(.16,1,.3,1), box-shadow .3s ease;
  -webkit-tap-highlight-color: transparent;
}

.cb-26__label {
  position: relative;
  z-index: 4;
  text-shadow: 0 1px 1px rgba(80,20,14,.4);
}
/* The dose has square corners on purpose: the capsule's own overflow:hidden +
   border-radius clip it, so the liquid takes the exact shape of the rounded cap. */

.cb-26__dose {
  position: absolute;
  z-index: 2;
  left: 0;
  top: 0;
  bottom: 0;
  right: calc(100% - var(--cap-w));
  transform-origin: 50% 100%;
  background: linear-gradient(180deg,
      color-mix(in oklab,var(--liquid) 70%,white),
      var(--liquid) 42%,
      color-mix(in oklab,var(--liquid) 82%,black));
  box-shadow: inset 0 .1rem 0 rgba(255,255,255,.6), inset 0 -.3rem .5rem rgba(120,60,0,.22);
  scale: 1 .22;
  transition: scale .55s cubic-bezier(.16,1,.3,1);
}

.cb-26__shine {
  position: absolute;
  z-index: 3;
  inset: 14% 8% auto;
  height: 26%;
  border-radius: 999px;
  pointer-events: none;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.85) 20%, rgba(255,255,255,.5) 58%, transparent);
  filter: blur(1.5px);
}

.cb-26__btn:is(:hover,:focus-visible) .cb-26__dose {
  scale: 1 .84;
}

.cb-26__btn:hover {
  translate: 0 -2px;
}

.cb-26__btn:active {
  scale: 1.03 .9;
  translate: 0 1px;
  box-shadow: inset 0 .3rem .8rem rgba(0,0,0,.28);
}

.cb-26__btn:focus-visible {
  outline: 2px solid var(--body);
  outline-offset: 4px;
}

.cb-26__btn:disabled {
  cursor: not-allowed;
  filter: grayscale(.75);
  opacity: .7;
}

@media (prefers-reduced-motion: reduce) {
  .cb-26__btn,
    .cb-26__dose {
    transition: none;
  }
}

@media (forced-colors: active) {
  .cb-26__btn {
    background: ButtonFace;
    color: ButtonText;
    border: 1px solid ButtonText;
    box-shadow: none;
  }

  .cb-26__dose,
    .cb-26__shine {
    display: none;
  }
}
Paste this into ChatGPT, Claude, Cursor, or any coding assistant. The block below is pre-framed with everything the AI needs to integrate this demo into your project — markup, styles, scoping notes, and the source URL. Hit Copy and paste straight into your chat.
Here's a working CSS Button from CodeFronts. Use it as-is or adapt to your framework. All classes are scoped under a unique prefix so the code won't collide with your existing styles. MIT licensed.
Demo: CSS Pharma Gel Capsule Button
Source: https://codefronts.com/components/css-buttons/css-pharma-gel-capsule-button/

A two-tone gelatin capsule with a wet specular streak, a visible seam where the halves overlap, and a dose of liquid that rises through the shell on hover. Press it and the capsule compresses along its long axis like soft gelatin.
## HTML
```html
<div class="cb-26">
  <div class="cb-26__stage">
    <button class="cb-26__btn" type="button">
      <span class="cb-26__dose" aria-hidden="true"></span>
      <span class="cb-26__shine" aria-hidden="true"></span>
      <span class="cb-26__label">Take one daily</span>
    </button>
  </div>
</div>
```
## CSS
```css
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@500;600;700&display=swap');

.cb-26 {
  --bg: #eef2f4;
  --cap: #f6f8fa;
  --body: #e0483c;
  --liquid: #ffb347;
  --ink: #ffffff;
  --ink-alt: #3a2d2b;
  --cap-w: 5.5rem;
  --sans: "DM Sans",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  width: 100%;
  min-height: 100vh;
  min-height: 100svh;
  display: block;
  background: radial-gradient(34rem 20rem at 50% 40%, #ffffff, transparent 70%), var(--bg);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

@supports (color: oklch(50% 0 0)) {
  .cb-26 {
    --bg: oklch(95.5% .006 220);
    --body: oklch(58% .19 28);
    --liquid: oklch(82% .14 72);
  }
}

@media (prefers-color-scheme: dark) {
  .cb-26:not([data-theme="light"]) {
    --bg: #141819;
    --cap: #dfe6ea;
    --body: #c4372c;
  }
}

.cb-26[data-theme="dark"] {
  --bg: #141819;
  --cap: #dfe6ea;
  --body: #c4372c;
}

.cb-26,
.cb-26 *,
.cb-26 *::before,
.cb-26 *::after {
  box-sizing: border-box;
}

.cb-26__stage {
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: clamp(1.5rem,6vw,4rem);
}

.cb-26__btn {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  cursor: pointer;
  min-height: 3.5rem;
  padding: 0 2.2rem 0 calc(var(--cap-w) + 1rem);
  border: 0;
  border-radius: 999px;
  font: inherit;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -.005em;
  color: var(--ink);
  background-image: linear-gradient(90deg, var(--cap) 0 var(--cap-w), var(--body) var(--cap-w) 100%), linear-gradient(90deg, transparent calc(var(--cap-w) - .5rem), rgba(0,0,0,.14) calc(var(--cap-w) - .1rem), rgba(255,255,255,.32) calc(var(--cap-w) + .2rem), transparent calc(var(--cap-w) + .7rem));
  box-shadow: inset 0 -.35rem .7rem rgba(0,0,0,.18), inset 0 .3rem .5rem rgba(255,255,255,.5), 0 14px 26px -14px rgba(30,20,18,.55);
  transition: scale .3s cubic-bezier(.16,1,.3,1), translate .3s cubic-bezier(.16,1,.3,1), box-shadow .3s ease;
  -webkit-tap-highlight-color: transparent;
}

.cb-26__label {
  position: relative;
  z-index: 4;
  text-shadow: 0 1px 1px rgba(80,20,14,.4);
}
/* The dose has square corners on purpose: the capsule's own overflow:hidden +
   border-radius clip it, so the liquid takes the exact shape of the rounded cap. */

.cb-26__dose {
  position: absolute;
  z-index: 2;
  left: 0;
  top: 0;
  bottom: 0;
  right: calc(100% - var(--cap-w));
  transform-origin: 50% 100%;
  background: linear-gradient(180deg,
      color-mix(in oklab,var(--liquid) 70%,white),
      var(--liquid) 42%,
      color-mix(in oklab,var(--liquid) 82%,black));
  box-shadow: inset 0 .1rem 0 rgba(255,255,255,.6), inset 0 -.3rem .5rem rgba(120,60,0,.22);
  scale: 1 .22;
  transition: scale .55s cubic-bezier(.16,1,.3,1);
}

.cb-26__shine {
  position: absolute;
  z-index: 3;
  inset: 14% 8% auto;
  height: 26%;
  border-radius: 999px;
  pointer-events: none;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.85) 20%, rgba(255,255,255,.5) 58%, transparent);
  filter: blur(1.5px);
}

.cb-26__btn:is(:hover,:focus-visible) .cb-26__dose {
  scale: 1 .84;
}

.cb-26__btn:hover {
  translate: 0 -2px;
}

.cb-26__btn:active {
  scale: 1.03 .9;
  translate: 0 1px;
  box-shadow: inset 0 .3rem .8rem rgba(0,0,0,.28);
}

.cb-26__btn:focus-visible {
  outline: 2px solid var(--body);
  outline-offset: 4px;
}

.cb-26__btn:disabled {
  cursor: not-allowed;
  filter: grayscale(.75);
  opacity: .7;
}

@media (prefers-reduced-motion: reduce) {
  .cb-26__btn,
    .cb-26__dose {
    transition: none;
  }
}

@media (forced-colors: active) {
  .cb-26__btn {
    background: ButtonFace;
    color: ButtonText;
    border: 1px solid ButtonText;
    box-shadow: none;
  }

  .cb-26__dose,
    .cb-26__shine {
    display: none;
  }
}
```

How this works

The two halves are one background: a hard-stop gradient at 50% plus a slightly wider overlap band that reads as the seam where the cap slides over the body:

background:
  linear-gradient(90deg, var(--cap) 0 49.4%, var(--body) 49.4% 100%),
  linear-gradient(90deg, transparent 46%, rgba(0,0,0,.16) 49%, rgba(255,255,255,.3) 52%, transparent 55%);

The wet look is a long, thin, blurred white streak sitting in the upper third — real gel capsules have one continuous specular line, not a soft gradient:

.cb-26__shine{ inset:14% 8% auto; height:26%; border-radius:999px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.85) 22%,rgba(255,255,255,.55) 60%,transparent);
  filter:blur(1.5px); }

The liquid is a square-cornered layer anchored to the bottom of the cap and scaled on the Y axis — the capsule's own overflow:hidden plus border-radius:999px clips it, so the dose takes the exact shape of the rounded end instead of looking like a smaller pill inside a pill:

.cb-26__dose{ inset:0 calc(100% - var(--cap-w)) 0 0;
  transform-origin:50% 100%; scale:1 .22;
  box-shadow:inset 0 .1rem 0 rgba(255,255,255,.6);  /* meniscus */
}
.cb-26__btn:hover .cb-26__dose{ scale:1 .84; }

The 0.1rem inset white line is the meniscus — without it the liquid's top edge reads as a printed stripe rather than a surface. The press compresses the whole capsule with scale:1.03 .9 — wider and shorter, which is how a soft body deforms under load.

Make it yours

  • Recolour the two halves independently with --cap and --body; keep one light and one saturated for the classic pharmacy look.
  • Change the liquid level's rest state with the base scale on .cb-26__dose — 1 .22 is a part-dose, 1 .84 is nearly full.
  • Remove the seam layer for a single-piece softgel.
  • Increase filter:blur() on the shine for a matte gelcap, or reduce to 0 for hard acrylic.

Gotchas — read before shipping

  • Hard-stop gradients at exactly 50% produce a shimmering seam on fractional-DPR displays; offset by 0.5-0.6% as here.
  • White specular streaks over a light half destroy label contrast — the label is placed on the saturated half for a reason.
  • Non-uniform scale distorts text. Keep the label in its own child with a counter-scale if you push the compression past 0.9.
  • Anything resembling medication needs care in production UI: don't imply dosage or medical function with a decorative button.
  • border-radius:999px plus overflow:hidden is what shapes the liquid, but it also clips inset focus rings — keep focus on outline.
  • Don't round the liquid layer itself. A rounded dose inside a rounded capsule reads as a second pill; let the parent's clip do the shaping.

Browser support

ChromeSafariFirefoxEdge
111+16.2+113+111+

Floor set by oklch(), color-mix() as this demo is written. The core technique itself goes back further — Chrome 104+.

All gradients and filters here are baseline; individual transform properties need Chrome 104 / Safari 14.1 / Firefox 72.

Techniques used in this demo

filterMDN ↗radial-gradient()MDN ↗color-mix()MDN ↗clamp()MDN ↗place-items / place-contentMDN ↗:focus-visibleMDN ↗

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